-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathhp2100_ms.c
1692 lines (1316 loc) · 78.3 KB
/
hp2100_ms.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* hp2100_ms.c: HP 2100 13181B/13183B Digital Magnetic Tape Unit Interface simulator
Copyright (c) 1993-2016, Robert M. Supnik
Copyright (c) 2017-2019, J. David Bryan
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the names of the authors shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the authors.
MS 13181B Digital Magnetic Tape Unit Interface
13183B Digital Magnetic Tape Unit Interface
01-Feb-19 JDB Remap sim_tape_attach to avoid unwanted debug output
24-Jan-19 JDB Removed DEV_TAPE from DEVICE flags
27-Dec-18 JDB Added fall through comments in msc_svc
05-Jun-18 JDB Revised I/O model
28-Feb-18 JDB Added the BMTL
23-Feb-18 JDB Eliminated "msc_boot" references to A and S registers
20-Jul-17 JDB Removed "msc_stopioe" variable and register
11-Jul-17 JDB Renamed "ibl_copy" to "cpu_ibl"
15-Mar-17 JDB Trace flags are now global
Changed DEBUG_PRI calls to tprintfs
13-Mar-17 JDB Deprecated LOCKED/WRITEENABLED for ATTACH -R
10-Mar-17 JDB Added IOBUS to the debug table
27-Feb-17 JDB ibl_copy no longer returns a status code
17-Jan-17 JDB Modified to use "odd_parity" array in hp2100_sys.c
13-May-16 JDB Modified for revised SCP API function parameter types
30-Dec-14 JDB Added S-register parameters to ibl_copy
24-Dec-14 JDB Use T_ADDR_FMT with t_addr values for 64-bit compatibility
Added casts for explicit downward conversions
11-Dec-14 JDB Updated for new erase gap API, added CRCC/LRCC support
10-Jan-13 MP Added DEV_TAPE to DEVICE flags
09-May-12 JDB Separated assignments from conditional expressions
10-Feb-12 JDB Deprecated DEVNO in favor of SC
Added CNTLR_TYPE cast to ms_settype
28-Mar-11 JDB Tidied up signal handling
26-Oct-10 JDB Changed I/O signal handler for revised signal model
11-Aug-08 JDB Revised to use AR instead of saved_AR in boot
26-Jun-08 JDB Rewrote device I/O to model backplane signals
28-Dec-06 JDB Added ioCRS state to I/O decoders
18-Sep-06 JDB Fixed 2nd CLR after WC causing another write
Improve debug reporting, add debug flags
14-Sep-06 JDB Removed local BOT flag, now uses sim_tape_bot
30-Aug-06 JDB Added erase gap support, improved tape lib err reporting
07-Jul-06 JDB Added CAPACITY as alternate for REEL
Fixed EOT test for unlimited reel size
16-Feb-06 RMS Revised for new EOT test
22-Jul-05 RMS Fixed compiler warning on Solaris (from Doug Glyn)
01-Mar-05 JDB Added SET OFFLINE; rewind/offline now does not detach
07-Oct-04 JDB Fixed enable/disable from either device
14-Aug-04 JDB Fixed many functional and timing problems (from Dave Bryan)
- fixed erroneous execution of rejected command
- fixed erroneous execution of select-only command
- fixed erroneous execution of clear command
- fixed odd byte handling for read
- fixed spurious odd byte status on 13183A EOF
- modified handling of end of medium
- added detailed timing, with fast and realistic modes
- added reel sizes to simulate end of tape
- added debug printouts
06-Jul-04 RMS Fixed spurious timing error after CLC (found by Dave Bryan)
26-Apr-04 RMS Fixed SFS x,C and SFC x,C
Fixed SR setting in IBL
Revised IBL loader
Implemented DMA SRQ (follows FLG)
25-Apr-03 RMS Revised for extended file support
28-Mar-03 RMS Added multiformat support
28-Feb-03 RMS Revised for magtape library
18-Oct-02 RMS Added BOOT command, added 13183A support
30-Sep-02 RMS Revamped error handling
29-Aug-02 RMS Added end of medium support
30-May-02 RMS Widened POS to 32b
22-Apr-02 RMS Added maximum record length test
References:
- 13181B Digital Magnetic Tape Unit Interface Kit Operating and Service Manual
(13181-90901, November 1982)
- 13183B Digital Magnetic Tape Unit Interface Kit Operating and Service Manual
(13183-90901, November 1983)
- SIMH Magtape Representation and Handling
(Bob Supnik, 30-Aug-2006)
*/
#include "hp2100_defs.h"
#include "hp2100_io.h"
#include "sim_tape.h"
/* Remap tape attach in 4.x to avoid unwanted debug output */
#if (SIM_MAJOR >= 4)
#define sim_tape_attach(a,b) sim_tape_attach_ex (a, b, 0, 0)
#endif
#define UNIT_V_OFFLINE (MTUF_V_UF + 0) /* unit offline */
#define UNIT_OFFLINE (1 << UNIT_V_OFFLINE)
#define MS_NUMDR 4 /* number of drives */
#define DB_N_SIZE 16 /* max data buf */
#define DBSIZE (1 << DB_N_SIZE) /* max data cmd */
#define FNC u3 /* function */
#define UST u4 /* unit status */
#define REEL u5 /* tape reel size */
#define BPI_13181 MT_DENS_800 /* 800 bpi for 13181 cntlr */
#define BPI_13183 MT_DENS_1600 /* 1600 bpi for 13183 cntlr */
#define GAP_13181 48 /* gap is 4.8 inches for 13181 cntlr */
#define GAP_13183 30 /* gap is 3.0 inches for 13183 cntlr */
#define TCAP (300 * 12 * 800) /* 300 ft capacity at 800 bpi */
/* Command - msc_fnc */
#define FNC_CLR 00110 /* clear */
#define FNC_GAP 00015 /* write gap */
#define FNC_GFM 00215 /* gap+file mark */
#define FNC_RC 00023 /* read */
#define FNC_WC 00031 /* write */
#define FNC_FSR 00003 /* forward space */
#define FNC_BSR 00041 /* backward space */
#define FNC_FSF 00203 /* forward file */
#define FNC_BSF 00241 /* backward file */
#define FNC_REW 00101 /* rewind */
#define FNC_RWS 00105 /* rewind and offline */
#define FNC_WFM 00211 /* write file mark */
#define FNC_RFF 00223 /* read file fwd (diag) */
#define FNC_RRR 00061 /* read record rev (diag) */
#define FNC_CMPL 00400 /* completion state */
#define FNC_V_SEL 9 /* select */
#define FNC_M_SEL 017
#define FNC_GETSEL(x) (((x) >> FNC_V_SEL) & FNC_M_SEL)
#define FNF_MOT 00001 /* motion */
#define FNF_OFL 00004
#define FNF_WRT 00010 /* write */
#define FNF_REV 00040 /* reverse */
#define FNF_RWD 00100 /* rewind */
#define FNF_CHS 00400 /* change select */
#define FNC_SEL ((FNC_M_SEL << FNC_V_SEL) | FNF_CHS)
/* Status - stored in msc_sta, unit.UST (u), or dynamic (d) */
#define STA_PE 0100000 /* 1600 bpi (d) */
#define STA_V_SEL 13 /* unit sel (d) */
#define STA_M_SEL 03
#define STA_SEL (STA_M_SEL << STA_V_SEL)
#define STA_ODD 0004000 /* odd bytes */
#define STA_REW 0002000 /* rewinding (u) */
#define STA_TBSY 0001000 /* transport busy (d) */
#define STA_BUSY 0000400 /* ctrl busy */
#define STA_EOF 0000200 /* end of file */
#define STA_BOT 0000100 /* beg of tape (d) */
#define STA_EOT 0000040 /* end of tape (d) */
#define STA_TIM 0000020 /* timing error */
#define STA_REJ 0000010 /* programming error */
#define STA_WLK 0000004 /* write locked (d) */
#define STA_PAR 0000002 /* parity error */
#define STA_LOCAL 0000001 /* local (d) */
#define STA_DYN (STA_PE | STA_SEL | STA_TBSY | STA_BOT | \
STA_EOT | STA_WLK | STA_LOCAL)
/* Controller types */
typedef enum {
A13181,
A13183
} CNTLR_TYPE;
/* Interface state */
typedef struct {
FLIP_FLOP control; /* control flip-flop */
FLIP_FLOP flag; /* flag flip-flop */
FLIP_FLOP flag_buffer; /* flag buffer flip-flop */
} CARD_STATE;
static CARD_STATE msd; /* data per-card state */
static CARD_STATE msc; /* command per-card state */
static CNTLR_TYPE ms_ctype = A13181; /* ctrl type */
static int32 ms_timing = 1; /* timing type */
static int32 msc_sta = 0; /* status */
static int32 msc_buf = 0; /* buffer */
static int32 msc_usl = 0; /* unit select */
static int32 msc_1st = 0; /* first service */
static int32 msd_buf = 0; /* data buffer */
static uint8 msxb [DBSIZE] = { 0 }; /* data buffer */
static t_mtrlnt ms_ptr = 0; /* buffer ptrs */
static t_mtrlnt ms_max = 0; /* buffer ptrs */
static t_bool ms_crc = FALSE; /* buffer ready for CRC calc */
/* Hardware timing at 45 IPS 13181 13183
(based on 1580 instr/msec) instr msec SCP instr msec SCP
-------------------- --------------------
- BOT start delay : btime = 161512 102.22 184 252800 160.00 288
- motion cmd start delay : ctime = 14044 8.89 16 17556 11.11 20
- GAP traversal time : gtime = 175553 111.11 200 105333 66.67 120
- IRG traversal time : itime = 24885 15.75 - 27387 17.33 -
- rewind initiation time : rtime = 878 0.56 1 878 0.56 1
- data xfer time / word : xtime = 88 55.56us - 44 27.78us -
NOTE: The 13181-60001 Rev. 1629 tape diagnostic fails test 17B subtest 6 with
"E116 BYTE TIME SHORT" if the correct data transfer time is used for
13181A interface. Set "xtime" to 115 (instructions) to pass that
diagnostic. Rev. 2040 of the tape diagnostic fixes this problem and
passes with the correct data transfer time.
*/
static int32 msc_btime = 0; /* BOT start delay */
static int32 msc_ctime = 0; /* motion cmd start delay */
static int32 msc_gtime = 0; /* GAP traversal time */
static int32 msc_itime = 0; /* IRG traversal time */
static int32 msc_rtime = 0; /* rewind initiation time */
static int32 msc_xtime = 0; /* data xfer time / word */
typedef int32 TIMESET[6]; /* set of controller times */
static int32 * const timers [] = { &msc_btime, &msc_ctime, &msc_gtime,
&msc_itime, &msc_rtime, &msc_xtime };
static const TIMESET msc_times [3] = {
{ 161512, 14044, 175553, 24885, 878, 88 }, /* 13181B */
{ 252800, 17556, 105333, 27387, 878, 44 }, /* 13183B */
{ 1, 1000, 1, 1, 100, 10 } /* FAST */
};
static INTERFACE msd_interface;
static INTERFACE msc_interface;
static t_stat msc_svc (UNIT *uptr);
static t_stat ms_reset (DEVICE *dptr);
static t_stat msc_attach (UNIT *uptr, CONST char *cptr);
static t_stat msc_detach (UNIT *uptr);
static t_stat msc_online (UNIT *uptr, int32 value, CONST char *cptr, void *desc);
static t_stat msc_boot (int32 unitno, DEVICE *dptr);
static t_stat ms_write_gap (UNIT *uptr);
static t_stat ms_map_err (UNIT *uptr, t_stat st);
static t_stat ms_settype (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
static t_stat ms_showtype (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
static t_stat ms_set_timing (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
static t_stat ms_show_timing (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
static t_stat ms_set_reelsize (UNIT *uptr, int32 val, CONST char *cptr, void *desc);
static t_stat ms_show_reelsize (FILE *st, UNIT *uptr, int32 val, CONST void *desc);
static void ms_config_timing (void);
static char *ms_cmd_name (uint32 cmd);
static t_stat ms_clear (void);
static uint32 calc_crc_lrc (uint8 *buffer, t_mtrlnt length);
/* Device information blocks */
static DIB ms_dib [] = {
{ &msd_interface, /* the device's I/O interface function pointer */
MSD, /* the device's select code (02-77) */
0, /* the card index */
"13181B/13183B Digital Magnetic Tape Unit Interface Data Channel", /* the card description */
NULL }, /* the ROM description */
{ &msc_interface, /* the device's I/O interface function pointer */
MSC, /* the device's select code (02-77) */
0, /* the card index */
"13181B/13183B Digital Magnetic Tape Unit Interface Command Channel", /* the card description */
"12992D 7970 Magnetic Tape Loader" } /* the ROM description */
};
#define msd_dib ms_dib [0]
#define msc_dib ms_dib [1]
/* Data card SCP data structures */
/* Unit list */
static UNIT msd_unit [] = {
/* Event Routine Unit Flags Capacity Delay */
/* ------------- ---------- -------- ----- */
{ UDATA (NULL, 0, 0) }
};
/* Register list */
static REG msd_reg [] = {
{ ORDATA (BUF, msd_buf, 16) },
{ FLDATA (CTL, msd.control, 0) },
{ FLDATA (FLG, msd.flag, 0) },
{ FLDATA (FBF, msd.flag_buffer, 0) },
{ BRDATA (DBUF, msxb, 8, 8, DBSIZE) },
{ DRDATA (BPTR, ms_ptr, DB_N_SIZE + 1) },
{ DRDATA (BMAX, ms_max, DB_N_SIZE + 1) },
DIB_REGS (msd_dib),
{ NULL }
};
/* Modifier list */
static MTAB msd_mod [] = {
/* Entry Flags Value Print String Match String Validation Display Descriptor */
/* ------------------- ----- ------------ ------------ ------------ ------------- ---------------- */
{ MTAB_XDV, 2u, "SC", "SC", &hp_set_dib, &hp_show_dib, (void *) &ms_dib },
{ MTAB_XDV | MTAB_NMO, ~2u, "DEVNO", "DEVNO", &hp_set_dib, &hp_show_dib, (void *) &ms_dib },
{ 0 }
};
/* Debugging trace list */
static DEBTAB msd_deb [] = {
{ "IOBUS", TRACE_IOBUS }, /* interface I/O bus signals and data words */
{ NULL, 0 }
};
/* Device descriptor */
DEVICE msd_dev = {
"MSD", /* device name */
msd_unit, /* unit array */
msd_reg, /* register array */
msd_mod, /* modifier array */
1, /* number of units */
10, /* address radix */
DB_N_SIZE, /* address width */
1, /* address increment */
8, /* data radix */
8, /* data width */
NULL, /* examine routine */
NULL, /* deposit routine */
&ms_reset, /* reset routine */
NULL, /* boot routine */
NULL, /* attach routine */
NULL, /* detach routine */
&msd_dib, /* device information block pointer */
DEV_DISABLE | DEV_DEBUG, /* device flags */
0, /* debug control flags */
msd_deb, /* debug flag name array */
NULL, /* memory size change routine */
NULL /* logical device name */
};
/* Command card SCP data structures */
/* Unit list */
#define UNIT_FLAGS (UNIT_ATTABLE | UNIT_ROABLE | UNIT_DISABLE | UNIT_OFFLINE)
static UNIT msc_unit [] = {
/* Event Routine Unit Flags Capacity Delay */
/* ------------- ---------- -------- ----- */
{ UDATA (&msc_svc, UNIT_FLAGS, 0) },
{ UDATA (&msc_svc, UNIT_FLAGS, 0) },
{ UDATA (&msc_svc, UNIT_FLAGS, 0) },
{ UDATA (&msc_svc, UNIT_FLAGS, 0) }
};
/* Register list */
static REG msc_reg [] = {
{ ORDATA (STA, msc_sta, 12) },
{ ORDATA (BUF, msc_buf, 16) },
{ ORDATA (USEL, msc_usl, 2) },
{ FLDATA (FSVC, msc_1st, 0) },
{ FLDATA (CTL, msc.control, 0) },
{ FLDATA (FLG, msc.flag, 0) },
{ FLDATA (FBF, msc.flag_buffer, 0) },
{ URDATA (POS, msc_unit[0].pos, 10, T_ADDR_W, 0, MS_NUMDR, PV_LEFT) },
{ URDATA (FNC, msc_unit[0].FNC, 8, 8, 0, MS_NUMDR, REG_HRO) },
{ URDATA (UST, msc_unit[0].UST, 8, 12, 0, MS_NUMDR, REG_HRO) },
{ URDATA (REEL, msc_unit[0].REEL, 10, 2, 0, MS_NUMDR, REG_HRO) },
{ DRDATA (BTIME, msc_btime, 24), REG_NZ + PV_LEFT },
{ DRDATA (CTIME, msc_ctime, 24), REG_NZ + PV_LEFT },
{ DRDATA (GTIME, msc_gtime, 24), REG_NZ + PV_LEFT },
{ DRDATA (ITIME, msc_itime, 24), REG_NZ + PV_LEFT },
{ DRDATA (RTIME, msc_rtime, 24), REG_NZ + PV_LEFT },
{ DRDATA (XTIME, msc_xtime, 24), REG_NZ + PV_LEFT },
{ FLDATA (TIMING, ms_timing, 0), REG_HRO },
{ FLDATA (CTYPE, ms_ctype, 0), REG_HRO },
DIB_REGS (msc_dib),
{ NULL }
};
/* Modifier list.
The LOCKED and WRITEENABLED modifiers are deprecated. The supported method
of write-protecting a tape drive is to attach the tape image with the -R
(read-only) switch or by setting the host operating system's read-only
attribute on the tape image file. This simulates removing the write ring
from the tape reel before mounting it on the drive. There is no hardware
method of write-protecting a mounted and positioned tape reel.
Implementation notes:
1. The UNIT_RO modifier displays "write ring" if the flag is not set. There
is no corresponding entry for the opposite condition because "read only"
is automatically printed after the attached filename.
*/
static MTAB msc_mod [] = {
/* Mask Value Match Value Print String Match String Validation Display Descriptor */
/* ------------- ------------- ---------------- --------------- ------------ ------- ---------- */
{ UNIT_RO, 0, "write ring", NULL, NULL, NULL, NULL },
{ UNIT_OFFLINE, UNIT_OFFLINE, "offline", "OFFLINE", NULL, NULL, NULL },
{ UNIT_OFFLINE, 0, "online", "ONLINE", &msc_online, NULL, NULL },
{ MTUF_WLK, 0, NULL, "WRITEENABLED", NULL, NULL, NULL },
{ MTUF_WLK, MTUF_WLK, NULL, "LOCKED", NULL, NULL, NULL },
/* Entry Flags Value Print String Match String Validation Display Descriptor */
/* ------------------- ----- ------------ ------------ ----------------- ------------------ ---------------- */
{ MTAB_XUN, 0, "CAPACITY", "CAPACITY", &ms_set_reelsize, &ms_show_reelsize, NULL },
{ MTAB_XUN | MTAB_NMO, 1, "REEL", "REEL", &ms_set_reelsize, &ms_show_reelsize, NULL },
{ MTAB_XUN, 0, "FORMAT", "FORMAT", &sim_tape_set_fmt, &sim_tape_show_fmt, NULL },
{ MTAB_XDV, 0, NULL, "13181A/B", &ms_settype, NULL, NULL },
{ MTAB_XDV, 1, NULL, "13183A/B", &ms_settype, NULL, NULL },
{ MTAB_XDV, 0, "TYPE", NULL, NULL, &ms_showtype, NULL },
{ MTAB_XDV, 0, NULL, "REALTIME", &ms_set_timing, NULL, NULL },
{ MTAB_XDV, 1, NULL, "FASTTIME", &ms_set_timing, NULL, NULL },
{ MTAB_XDV, 0, "TIMING", NULL, NULL, &ms_show_timing, NULL },
{ MTAB_XDV, 2u, "SC", "SC", &hp_set_dib, &hp_show_dib, (void *) &ms_dib },
{ MTAB_XDV | MTAB_NMO, ~2u, "DEVNO", "DEVNO", &hp_set_dib, &hp_show_dib, (void *) &ms_dib },
{ 0 }
};
/* Debugging trace list */
static DEBTAB msc_deb [] = {
{ "CMDS", DEB_CMDS },
{ "RWS", DEB_RWS },
{ "CPU", DEB_CPU },
{ "IOBUS", TRACE_IOBUS }, /* interface I/O bus signals and data words */
{ NULL, 0 }
};
/* Device descriptor */
DEVICE msc_dev = {
"MSC", /* device name */
msc_unit, /* unit array */
msc_reg, /* register array */
msc_mod, /* modifier array */
MS_NUMDR, /* number of units */
10, /* address radix */
31, /* address width */
1, /* address increment */
8, /* data radix */
8, /* data width */
NULL, /* examine routine */
NULL, /* deposit routine */
&ms_reset, /* reset routine */
&msc_boot, /* boot routine */
&msc_attach, /* attach routine */
&msc_detach, /* detach routine */
&msc_dib, /* device information block pointer */
DEV_DISABLE | DEV_DEBUG, /* device flags */
0, /* debug control flags */
msc_deb, /* debug flag name array */
NULL, /* memory size change routine */
NULL /* logical device name */
};
/* Data channel interface */
static SIGNALS_VALUE msd_interface (const DIB *dibptr, INBOUND_SET inbound_signals, HP_WORD inbound_value)
{
INBOUND_SIGNAL signal;
INBOUND_SET working_set = inbound_signals;
SIGNALS_VALUE outbound = { ioNONE, 0 };
t_bool irq_enabled = FALSE;
uint32 check;
while (working_set) { /* while signals remain */
signal = IONEXTSIG (working_set); /* isolate the next signal */
switch (signal) { /* dispatch the I/O signal */
case ioCLF: /* Clear Flag flip-flop */
msd.flag_buffer = CLEAR; /* reset the flag buffer */
msd.flag = CLEAR; /* and flag flip-flops */
break;
case ioSTF: /* Set Flag flip-flop */
msd.flag_buffer = SET; /* set the flag buffer flip-flop */
break;
case ioENF: /* Enable Flag */
if (msd.flag_buffer == SET) /* if the flag buffer flip-flop is set */
msd.flag = SET; /* then set the flag flip-flop */
break;
case ioSFC: /* Skip if Flag is Clear */
if (msd.flag == CLEAR) /* if the flag flip-flop is clear */
outbound.signals |= ioSKF; /* then assert the Skip on Flag signal */
break;
case ioSFS: /* Skip if Flag is Set */
if (msd.flag == SET) /* if the flag flip-flop is set */
outbound.signals |= ioSKF; /* then assert the Skip on Flag signal */
break;
case ioIOI: /* I/O data input */
if (ms_crc) { /* ready for CRC? */
check = calc_crc_lrc (msxb, ms_max); /* calculate CRCC and LRCC */
msd_buf = TO_WORD (UPPER_WORD (check), /* position CRCC in upper byte */
check); /* and LRCC in lower byte */
}
outbound.value = msd_buf; /* return value */
break;
case ioIOO: /* I/O data output */
msd_buf = inbound_value; /* store data */
break;
case ioPOPIO: /* Power-On Preset to I/O */
ms_clear (); /* issue CLR to controller */
break;
case ioCRS: /* Control Reset */
msd.control = CLEAR; /* clear the control flip-flop */
msd.flag_buffer = SET; /* and set the flag buffer flip-flop */
break;
case ioCLC: /* Clear Control flip-flop */
msd.control = CLEAR; /* clear the control flip-flop */
break;
case ioSTC: /* Set Control flip-flop */
msd.control = SET; /* set the control flip-flop */
ms_crc = FALSE; /* reset CRC ready */
break;
case ioSIR: /* Set Interrupt Request */
if (msd.control & msd.flag) /* if the control and flag flip-flops are set */
outbound.signals |= cnVALID; /* then deny PRL */
else /* otherwise */
outbound.signals |= cnPRL | cnVALID; /* conditionally assert PRL */
if (msd.control & msd.flag & msd.flag_buffer) /* if the control, flag, and flag buffer flip-flops are set */
outbound.signals |= cnIRQ | cnVALID; /* then conditionally assert IRQ */
if (msd.flag == SET) /* if the flag flip-flop is set */
outbound.signals |= ioSRQ; /* then assert SRQ */
break;
case ioIAK: /* Interrupt Acknowledge */
msd.flag_buffer = CLEAR; /* clear the flag buffer flip-flop */
break;
case ioEDT: /* End Data Transfer */
msd.flag_buffer = CLEAR; /* reset the flag buffer */
msd.flag = CLEAR; /* and flag flip-flops */
break;
case ioIEN: /* Interrupt Enable */
irq_enabled = TRUE; /* permit IRQ to be asserted */
break;
case ioPRH: /* Priority High */
if (irq_enabled && outbound.signals & cnIRQ) /* if IRQ is enabled and conditionally asserted */
outbound.signals |= ioIRQ | ioFLG; /* then assert IRQ and FLG */
if (!irq_enabled || outbound.signals & cnPRL) /* if IRQ is disabled or PRL is conditionally asserted */
outbound.signals |= ioPRL; /* then assert it unconditionally */
break;
case ioPON: /* not used by this interface */
break;
}
IOCLEARSIG (working_set, signal); /* remove the current signal from the set */
} /* and continue until all signals are processed */
return outbound; /* return the outbound signals and value */
}
/* Command channel interface.
Implementation notes:
1. Commands are usually initiated with an STC cc,C instruction. The CLR
command completes immediately and sets the flag. This requires that we
ignore the CLF part (but still process the SIR).
2. The command channel card clears its flag and flag buffer on EDT, but as
it never asserts SRQ, it will never get EDT. Under simulation, we omit
the EDT handler.
3. In hardware, the command channel card passes PRH to PRL. The data card
actually drives PRL with both channels' control and flag states. That
is, the priority chain is broken at the data card, even when the command
card is interrupting. This works in hardware, but we must break PRL at
the command card under simulation to allow the command card to interrupt.
*/
static SIGNALS_VALUE msc_interface (const DIB *dibptr, INBOUND_SET inbound_signals, HP_WORD inbound_value)
{
static const uint8 map_sel [16] = {
0, 0, 1, 1, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3
};
int32 sched_time;
UNIT *uptr = msc_dev.units + msc_usl;
INBOUND_SIGNAL signal;
INBOUND_SET working_set = inbound_signals;
SIGNALS_VALUE outbound = { ioNONE, 0 };
t_bool irq_enabled = FALSE;
while (working_set) { /* while signals remain */
signal = IONEXTSIG (working_set); /* isolate the next signal */
switch (signal) { /* dispatch the I/O signal */
case ioCLF: /* Clear Flag flip-flop */
msc.flag_buffer = CLEAR; /* reset the flag buffer */
msc.flag = CLEAR; /* and flag flip-flops */
break;
case ioSTF: /* Set Flag flip-flop */
msc.flag_buffer = SET; /* set the flag buffer flip-flop */
break;
case ioENF: /* Enable Flag */
if (msc.flag_buffer == SET) /* if the flag buffer flip-flop is set */
msc.flag = SET; /* then set the flag flip-flop */
break;
case ioSFC: /* Skip if Flag is Clear */
if (msc.flag == CLEAR) /* if the flag flip-flop is clear */
outbound.signals |= ioSKF; /* then assert the Skip on Flag signal */
break;
case ioSFS: /* Skip if Flag is Set */
if (msc.flag == SET) /* if the flag flip-flop is set */
outbound.signals |= ioSKF; /* then assert the Skip on Flag signal */
break;
case ioIOI: /* I/O data input */
outbound.value = (HP_WORD) msc_sta & ~STA_DYN; /* get card status */
if ((uptr->flags & UNIT_OFFLINE) == 0) { /* online? */
outbound.value |= (HP_WORD) uptr->UST; /* add unit status */
if (sim_tape_bot (uptr)) /* BOT? */
outbound.value |= STA_BOT;
if (sim_is_active (uptr) && /* TBSY unless RWD at BOT */
!((uptr->FNC & FNF_RWD) && sim_tape_bot (uptr)))
outbound.value |= STA_TBSY;
if (sim_tape_wrp (uptr)) /* write prot? */
outbound.value |= STA_WLK;
if (sim_tape_eot (uptr)) /* EOT? */
outbound.value |= STA_EOT;
}
else
outbound.value |= STA_TBSY | STA_LOCAL;
if (ms_ctype == A13183) /* 13183? */
outbound.value |= STA_PE | (HP_WORD) msc_usl << STA_V_SEL;
tprintf (msc_dev, DEB_CPU, "Status = %06o\n", outbound.value);
break;
case ioIOO: /* I/O data output */
msc_buf = inbound_value; /* clear supplied status */
tprintf (msc_dev, DEB_CPU, "Command = %06o\n", msc_buf);
msc_sta = msc_sta & ~STA_REJ; /* clear reject */
if ((msc_buf & 0377) == FNC_CLR) /* clear always ok */
break;
if (msc_sta & STA_BUSY) { /* busy? reject */
msc_sta = msc_sta | STA_REJ; /* dont chg select */
break;
}
if (msc_buf & FNF_CHS) { /* select change */
msc_usl = map_sel [FNC_GETSEL (msc_buf)]; /* is immediate */
uptr = msc_dev.units + msc_usl;
tprintf (msc_dev, DEB_CMDS, "Unit %d selected\n", msc_usl);
}
if (((msc_buf & FNF_MOT) && sim_is_active (uptr)) ||
((msc_buf & FNF_REV) && sim_tape_bot (uptr)) ||
((msc_buf & FNF_WRT) && sim_tape_wrp (uptr)))
msc_sta = msc_sta | STA_REJ; /* reject? */
break;
case ioCRS: /* Control Reset */
msc.control = CLEAR; /* clear the control flip-flop */
msc.flag_buffer = SET; /* and set the flag buffer flip-flop */
break;
case ioCLC: /* Clear Control flip-flop */
msc.control = CLEAR; /* clear the control flip-flop */
break;
case ioSTC: /* Set Control flip-flop */
if (!(msc_sta & STA_REJ)) { /* last cmd rejected? */
if ((msc_buf & 0377) == FNC_CLR) { /* clear? */
ms_clear (); /* issue CLR to controller */
msc.control = SET; /* set CTL for STC */
msc.flag_buffer = SET; /* set flag and flag buffer */
msc.flag = SET; /* for immediate completion */
working_set = working_set & ~ioCLF; /* eliminate possible CLF */
tprintf (msc_dev, DEB_CMDS, "Controller cleared\n");
break; /* command completes immediately */
}
uptr->FNC = msc_buf & 0377; /* save function */
if (uptr->FNC & FNF_RWD) { /* rewind? */
if (!sim_tape_bot (uptr)) /* not at BOT? */
uptr->UST = STA_REW; /* set rewinding */
sched_time = msc_rtime; /* set response time */
}
else {
if (sim_tape_bot (uptr)) /* at BOT? */
sched_time = msc_btime; /* use BOT start time */
else if ((uptr->FNC == FNC_GAP) || (uptr->FNC == FNC_GFM))
sched_time = msc_gtime; /* use gap traversal time */
else sched_time = 0;
if (uptr->FNC != FNC_GAP)
sched_time += msc_ctime; /* add base command time */
}
if (msc_buf & ~FNC_SEL) { /* NOP for unit sel alone */
sim_activate (uptr, sched_time); /* else schedule op */
tprintf (msc_dev, DEB_CMDS, "Unit %d command %03o (%s) scheduled, "
"pos = %" T_ADDR_FMT "d, time = %d\n",
msc_usl, uptr->FNC, ms_cmd_name (uptr->FNC),
uptr->pos, sched_time);
}
else
tprintf (msc_dev, DEB_CMDS, "Unit select (NOP)\n");
msc_sta = STA_BUSY; /* ctrl is busy */
msc_1st = 1;
msc.control = SET; /* go */
}
break;
case ioSIR: /* Set Interrupt Request */
if (msc.control & msc.flag) /* if the control and flag flip-flops are set */
outbound.signals |= cnVALID; /* then deny PRL */
else /* otherwise */
outbound.signals |= cnPRL | cnVALID; /* conditionally assert PRL */
if (msc.control & msc.flag & msc.flag_buffer) /* if the control, flag, and flag buffer flip-flops are set */
outbound.signals |= cnIRQ | cnVALID; /* then conditionally assert IRQ */
if (msc.flag == SET) /* if the flag flip-flop is set */
outbound.signals |= ioSRQ; /* then assert SRQ */
break;
case ioIAK: /* Interrupt Acknowledge */
msc.flag_buffer = CLEAR; /* clear the flag buffer flip-flop */
break;
case ioIEN: /* Interrupt Enable */
irq_enabled = TRUE; /* permit IRQ to be asserted */
break;
case ioPRH: /* Priority High */
if (irq_enabled && outbound.signals & cnIRQ) /* if IRQ is enabled and conditionally asserted */
outbound.signals |= ioIRQ | ioFLG; /* then assert IRQ and FLG */
if (!irq_enabled || outbound.signals & cnPRL) /* if IRQ is disabled or PRL is conditionally asserted */
outbound.signals |= ioPRL; /* then assert it unconditionally */
break;
case ioEDT: /* not used by this interface */
case ioPON: /* not used by this interface */
case ioPOPIO: /* not used by this interface */
break;
}
IOCLEARSIG (working_set, signal); /* remove the current signal from the set */
} /* and continue until all signals are processed */
return outbound; /* return the outbound signals and value */
}
/* Unit service
If rewind done, reposition to start of tape, set status
else, do operation, set done, interrupt.
In addition to decreasing the timing intervals, the FASTTIME option enables
two additional optimizations: WFM for GFM substitution, and BOT gap
elimination. If FASTTIME is selected, gap and file mark (GFM) commands are
processed as WFM (write file mark) commands. That is, the preceding GAP is
not performed. Also, the initial gap that normally precedes the first data
record or EOF mark at the beginning of the tape is omitted. These omissions
result in smaller tape image files. If REALTIME is selected, the gaps are
included. Note that the gaps (and realistic timing) are necessary to pass
the 7970 diagnostics.
*/
static t_stat msc_svc (UNIT *uptr)
{
int32 unum;
t_mtrlnt tbc;
t_stat st, r = SCPE_OK;
unum = uptr - msc_unit; /* get unit number */
if ((uptr->FNC != FNC_RWS) && (uptr->flags & UNIT_OFFLINE)) { /* offline? */
msc_sta = (msc_sta | STA_REJ) & ~STA_BUSY; /* reject */
msc.flag_buffer = SET; /* set the flag buffer */
io_assert (&msc_dev, ioa_ENF); /* and the flag */
return SCPE_OK;
}
switch (uptr->FNC) { /* case on function */
case FNC_RWS: /* rewind offline */
sim_tape_rewind (uptr); /* rewind tape */
uptr->flags = uptr->flags | UNIT_OFFLINE; /* set offline */
uptr->UST = 0; /* clear REW status */
break; /* we're done */
case FNC_REW: /* rewind */
if (uptr->UST & STA_REW) { /* rewind in prog? */
uptr->FNC |= FNC_CMPL; /* set compl state */
sim_activate (uptr, msc_ctime); /* sched completion */
}
break; /* anyway, ctrl done */
case FNC_REW | FNC_CMPL: /* complete rewind */
sim_tape_rewind (uptr); /* rewind tape */
uptr->UST = 0; /* clear REW status */
return SCPE_OK; /* drive is free */
case FNC_GFM: /* gap + file mark */
if (ms_timing == 1) /* fast timing? */
goto DO_WFM; /* do plain file mark */
/* fall through into GAP */
case FNC_GAP: /* erase gap */
tprintf (msc_dev, DEB_RWS, "Unit %d wrote gap\n", unum);
r = ms_write_gap (uptr); /* write tape gap*/
if (r || (uptr->FNC != FNC_GFM)) /* if error or not GFM */
break; /* then bail out now */
/* fall through into WFM */
case FNC_WFM: /* write file mark */
if ((ms_timing == 0) && sim_tape_bot (uptr)) { /* realistic timing + BOT? */
tprintf (msc_dev, DEB_RWS, "Unit %d wrote initial gap\n", unum);
st = ms_write_gap (uptr); /* write initial gap*/
if (st != MTSE_OK) { /* error? */
r = ms_map_err (uptr, st); /* map error */
break; /* terminate operation */
}
}
DO_WFM:
tprintf (msc_dev, DEB_RWS, "Unit %d wrote file mark\n", unum);
st = sim_tape_wrtmk (uptr); /* write tmk */
if (st != MTSE_OK) /* error? */
r = ms_map_err (uptr, st); /* map error */
msc_sta = STA_EOF; /* set EOF status */
break;
case FNC_FSR: /* space forward */
st = sim_tape_sprecf (uptr, &tbc); /* space rec fwd */
if (st != MTSE_OK) /* error? */
r = ms_map_err (uptr, st); /* map error */
if (tbc & 1)
msc_sta = msc_sta | STA_ODD;
else msc_sta = msc_sta & ~STA_ODD;
break;
case FNC_BSR: /* space reverse */
st = sim_tape_sprecr (uptr, &tbc); /* space rec rev*/
if (st != MTSE_OK) /* error? */
r = ms_map_err (uptr, st); /* map error */
if (tbc & 1)
msc_sta = msc_sta | STA_ODD;
else msc_sta = msc_sta & ~STA_ODD;
break;
case FNC_FSF: /* space fwd file */
while ((st = sim_tape_sprecf (uptr, &tbc)) == MTSE_OK) {
if (sim_tape_eot (uptr)) break; /* EOT stops */
}
r = ms_map_err (uptr, st); /* map error */
break;
case FNC_BSF: /* space rev file */
while ((st = sim_tape_sprecr (uptr, &tbc)) == MTSE_OK) ;
r = ms_map_err (uptr, st); /* map error */
break;
case FNC_RFF: /* diagnostic read */
case FNC_RC: /* read */
if (msc_1st) { /* first svc? */
msc_1st = ms_ptr = ms_max = 0; /* clr 1st flop */
st = sim_tape_rdrecf (uptr, msxb, &ms_max, DBSIZE); /* read rec */